Sealed bag and process for making same



Jan. 18, 1944. v, VON H s 2,339,304

SEALED BAG AND PROCESS FOR MAKING SAME Filed Sept. 50, 1940 sSheets-Sheet 1 IN VENT OR.

BY VMTOA A. 1/0/1 f/AA'Ji Jan. 18, 1944. v. A. VON HAASE SEALED BAG ANDPROCESS FOR MAKING SAME Filed Sept. 30, 1940 '3 Sheets-Sheet 2 54INVENTOR.

F. C A m N w A M T m MM4M--4 Jan. 18, 1944.

V. A. VON HAASE SEALED BAG AND PROCESS FOR MAKING SAME Filed Sept. 30,1940 3 Sheets-Sheet 3 INVENTOR. *V/UM A. 1/0/1 f/AAM Patented Jan. l8,1944 shaman BAG AND raocnss FOR MAKING SAME Victor A. von Haas, RockyRiver, Ohio Application September 30, 1940, Serial No. 358,969

12 Claims. My invention relates in general to sealed bags and moreparticularly to sealed bags having an external pocket and the method andmeans for sealing an end of a bag having the said external pocket.

The modern practice is to merchandise certain edible products in sealedtransparent bags. In the stores, the sealed bags are displayed upon asuitable rack to attract the attention of customers. To facilitate thedisplaying of my bag upon a rack, I provide in oneend of the bag anexternal pocket which constitutes a meanswhereby the bag may be easilyhooked upon the rack.

An object of my invention is the provision of a bag-having an externalpocket provided in one end thereof. 6

Another object of my invention is the provision of a method and meansfor making a pocket in an end of the bag at the same time that the-endof the bag is sealed.

Another object of my invention is to provide for making a pocket in theend of a bag by folding the end portion of the bag back upon itself andsealing the folded end portion of the bag with a certain portionunsealed to form the pocket.

Another object of my invention is the provision of forming an externalpocket in a sealed and of a bag by folding the end portion of the bagback upon itself and then separating a portion of the folded material toform the pocket and sealing the remaining portion of the folded materialabout the separated material to support the pocket.

Otherobjects and a fuller understanding of my invention may be had byreferring to the following description and claims, taken in eonjunctionwith the accompanyingdrawings, in which:

Figure 1 represents a side elevational and crosssectional view of adevice for sealing the end of a bag and making a pocket therein, saidview being taken along the line l-l of Figure 4;

Figure 2 is a view similar to Figure l, with the parts shown in adifferent operating position;

v Figure 3 is a view similar to Figure 1, with the part shown in a stilldifferent operating position;

Figure 4 is a plan-view of the device;

Figure 5 is a front view of my device, with certain parts, removed forthe purpose of clarity;

Figure 6 is a front elevational view of a bag embodying the features ofmy invention;

Figure 7 is an'enlarged cross-sectional view of the sealed end of thebag, taken along the line 1-1 of'Figure 6;

Figure 8 is an enlarged cross-sectional view'of v tionary pressingmember end by a bracket 36 which in turn is pivotally anchored to apivot pin 4| having its end fastened to the side walls 54 and of theframe 35. The

the sealed end of the bag, taken along the line 8-8 of Figure 6;

Figure 9 is an enlarged cross-sectional viewof the sealed end of thebag, taken along the line 9-9 of Figure 6, and

Figure 10 is a view showing a bag embodying my invention as hung upon ahook of a rack.

With reference to Figures 6 to 10, inclusive. the reference character I5represents generally a bag having a sealed end It with a pocket l6,

whereby the bag may be suspended on a hook H of a suitable rack. Asillustrated, the upper marginal edge of the sealed end I 6 of the bag'is sealed all the way across from one edge of the 'bag to the other.The upper marginal edge is.

represented by the reference character 19 and the eal providedtherebytightly encloses the contents within the bag. In making the sealed endll! of the bag, the end portion of the bag is folded back upon itself,as shown for example in Figure 7, thereby making two inner thicknesses22 and 23 and two outer thicknesses 24 and 25. The material from whichthe bag is made is of the kind in which a sealing action takes placewhen pressure and heat is applied thereto. The side portions of thefolded material on opposite sides of the pocket I 6 are represented bythe reference characters 20 and 2|. In sealing the bag, pressure andheat'isapplled to theportions' represented by the reference charactersIO, 26 and 2|, thereby sealing the four thicknesses of th material withthe exception of the pocket It.

The pocket I6 is provided by separating the two thicknesse of material22 and 23,-so that the adjacent side of the thicknesses 22 and 23 arenot sealed together, although the adjacent sides of the thicknesses 22and 24 and 23 and 2-5 are sealed together,

The device for sealing the pocket IS in the fold-v ed end of the bag isshown inFigures 1 to 5, inclusive. The folded end it of the bag isheated and pressed together by two longitudinal'pressing members I! and32, each respectfully carrying electrical heating elements 33 and 34therein. The electrical heating elements 33 and 34, may be energized bya suitable source through wires 42 and 43. The pressing member 3| willbe characterized as being stationary although it is not strictlyimmovable. The pressing-member 32 will be characterized as being movablerelative to the stationary pressing member 3!. The sta- 3l is supportedat each is placed-overtime;twospressing membersdiand 32 as shown inFigure brackets 35 are supported by'a relatively strong spring 31, whichdepresses slightly when an extra thickness of the folded bag is pressedbetween the pressing members. A stop or boss 44 limits the brackets 36from swinging upwardly by the urging force of the spring 31. The frontlongitudinal edge of the stationary pressing member 3| is insulated bymeans of .insulation 38 over which is I a cover plate suitably connectedthereto by means of the illustrated screws. The movable l pressingmember 32 i moved relative to the stationary pressing plate 3| by meansof a pair of spaced L-shaped arms4|l which pivotally swing about thepivot pin 4|.

The end of the bag to be sealed is placed across v the top of thepressing members 3| and 32 as shown in Figure 1, and the end of the sackis folded back upon itself between the two pressing members 3| and 32 bymeans of a folding device 46 which is swingably carried by an arm 43rotatively mounted about a rear pivot shaft 43 having its ends carriedin the side walls 54 and 55 of the frame 35. The separating device formaking the pocket It is illustrated by the reference character 41 anditis resiliently fastened to a swinging arm 5| by means of a screw 55and a spring 66', which permits the separating device 41 to assume anunconstrained position between the pressing members. The swinging arm 5|is rotatively mounted about the pivot shaft 49. The separating device 41is positioned substantially centrally of the longitudinal length of thepressbig members 3| and 32, and the folding device which comprises twoparts is positioned respectively on opposite sides of the separatingdevice 41. The actuating arm 48 which swingably moves the folding device43 is likewise in two parts, one

beingon each side of the swingable arm 5| which actuates the separatingdevice 41. The two parts 'of the swinging. arm 43 are connected together40 near the pivot shaft 43 by means of a cross strap 53. In this mannerthe two parts of the swinging arm 43 move simultaneously. A recess 52 isprovided in the movable pressing member 32 to receive the separatingdevice 41 upon the closing of the pressing members 3| and 32. A guard 53or stop member is provided upon the rearward edge of the movablepressing member 32 to serve as a stop against which the end of the bagto be I sealed is abutted when it is placed overthe pressingmembers forthe sealing operation.

When effecting the sealing operation, the bag 1, after which both thefolding device 43 and the separating device 41 move downwardly and foldthe end portion of the bag back upon itself between the two pressingmembers 3| and 32 as shown in Figure 2.

- After the end of the bag is folded back upon itself between the twopressing members 3| and 32, the folding device 46 is raised as shown inFigure 3, leaving the separating device 41 positioned in the recess 52between the pressing members 3| and 32. In the position shown in Figure3, pressure and heat is applied to the portions I3, 23 and 2| of thefolded end of the bag for sealin the four thicknesses of the material.Pressure and heat is also applied to the two thicknesses of the material22 and 24 for sealing these two thicknesses together. Pressure and heatis also applied to the two thicknesses 23 and 25 for sealing these twothicknesses together. The portion which is unsealed is the surfacesbetween the two thicknesses 22 and 23 which is separated by theseparating device 41. After the sealing is comand the pleted, themovable pressing member 32 moves away from the stationary pressingmember 3| separating device 41 is then withdrawn as shown in Figure 1.The separating device 41 may comprise a material which is anon-conductor of heat such, for example, as a rubber composition or anyother suitable metal and its shape conforms to the shape of the pocketto be formed;

The movable pressing member 32 is about the pivot pin 4| by means of apair of knee action levers 56 and 51 mounted near opposite sides of theframe side walls 54 and 55, see Figure 4. The rear ends of the levers 51are rotatably mounted about the pivot shaft 45. Th forward ends of theknee action levers 55 are connected to the L-shapad members 40 by meansof a cross pin 58., The intermediate ends of the knee action levers 56and 51 are connected together byconnecting pins 59, each having a roller53 mounted thereon. As illustrated in Figure 4, the connecting pins 55are provided upon one end with heads 63 ,which are placed adjacent therollers 60 and the opposite ends of the connecting pins are providedwith. nuts 64 which keep the 'pin securely in position. The rollers 53are actuated downwardly by a pair of spaced cams 6| mounted upon spacedlocations about a drive shaft 52 which is rotatively mounted in the sidewalls 54 and 55 of the frame 35. Therefore, as the cams 6| are rotatedby the drive shaft 52, the rollers 60 are depressed causing the kneeaction levers 56 and 51 to actuate the movable' pressing member 32forwardly against the site: tionary pressing member 3|. The levers 56and 51 are raised by-means of springs 15 having one end attached theretoand the other end attached to the rear of the'frame 33. The swingablearm 48 which carries the folding device 46 is actuated downwardly bymeans of a cam 10 positioned upon the drive shaft 32. As shown in Figure4, the cam 13 engages only one of the two parts ofthe swinging arm 43but inasmuch as the two parts of the arm 43 are connected by theconnecting member 53, the cam 10 actuates both of the parts of theswingabie arm 43 and thus both parts of the folding devicesimultaneously. The swingable arm 5| which carries the separating device41 is actuated downwardly by a cam 1| which is rotated by the driveshaft 32. The rotation of the cams l3 and 1| depress the swingable arms43 and 5| to cause the folding=device 46' and the separating device "tofold the end'of the bag back upon itself between the two pressingmembers 3| and 32, a shown in Figure '2. A spring 13 havin one end con-'nected to the swinging arm 43 and having the other end connected to therear of the frame 33 is. arranged to withdraw the folding device 43 frombetween the two pressing members. A spring 11 having one end connectedto the swinging arm 5| and the other end connected to the rear of theframe 35 is arranged to withdraw the separating device 41 from betweenthe pressing members. The cams 5|, 13and 1| are so arranged that thecycle of op'erafion maybe described as follows: Beginning withtheposition as shown inFigurel the folding device 43 and the separatingdevice .41 are both moved downwardly between the .two pressing members3| and 32 for folding the end of the bag to be scaled back upon itselfbetween the two pressing members 3 and .32. Upon the completion of thefoldin of the end of the'bagflaetween the two pressing members 3| and32,.the fQding device 43 is knee action I withdrawn, after. which themovable pressing member 32 moves toward the stationary pressing.

member 3|, which presses and heats the folded end of the bagtherebetween, with the separating device 41 positioned between the twoinner thicknesses 23 and 24 which prevent them from being and 32 andassumes the position as shown in Figure 1 which;completes the cycle ofthe operation. As shown in Figure 4, the drive shut 52 may be operatedby means ofa motor 14 and a clutch l2 controlled by a control lever 13.

My invention for forming an external pocket in a sealed endof a bag maybe used to form a pocket during the sealing of the closed end of the bagas originally made, or may be used to form a pocket during the sealingof the open end of the bag after the contents are placed therein. v r Ihave shown and described a bag made of material which seals upon theapplication of heat and pressure and in which the sealed end of the bagis provided with the pocket l6 which may be suspended upon a hook I! ofa suitable rack for x. 3 relation, the said four sealed walls and thepocket therein lying in a plane substantially parallel to the medialplane of the bag.-

3'. A bag having two sides with a pocket provided in a sealed endportionthereof, said sealed end portion comprising the transverse edgeof the two' sides folded back upon themselves and forming a plurality ofwalls of the bag material with one of the walls of the folded portiondisposed parallel to the sidewall of which it is a continuation, thecentral portion of one of said plurality of walls of the folded portionand an adjacent wall being unsealed with each other and forming theinside surfaces of said pocket, the remaining portion of the walls ofsaid folded portion between the edges ,of the bag and the pocket beingsealed and supporting the pocket,-said fold ed walls being sealed in aflatwise relation, the said sealed walls and the pocket therein lying ina plane substantially parallel to the medial plane of thebag.

4. The process of forming an external pocket in a sealed end of a bagmade of heat sealing -material comprising the steps of bringing thedisplaying the bag. I have also shown and described a process by whichthe pocket l6 may be positioned -in the sealed end of thev bag as wellas a device for accomplishing the sealing action above described. 4

Although I have described my invention with a certain degree ofparticularity, it is understood that the present disclosure has beenmade only by way of example and that numerous changes in the details ofconstruction and the combination and arrangement of parts may beresorted to without departing from the spirit and the scope of theinvention as hereinafter claimed.

I claim as. my invention: 1. A bag'having two sides with a pocketprovidedlin a sealed end portion thereof, said sealedv end portioncomprising the transverse edge of the two sides folded back uponthemselves and forming four walls of the material of the bag with one ofthe walls of the folded portion disposed adjacent to the side wall ofwhich it is a continuation, the marginal edge portion of thetransversefolded .end of the bag being sealed all the way,thereacross,the central portion of the said one of the walls of the folded portionand of said side wall of which it isa continuation being unsealed with.each other and forming the inside surfaces of the medial plane of thebag.

two side walls of the bag adjacent to each other,

transversely folding the two side walls back upon themselves to formfour walls of the material withone of the walls of the folded portiondisposed adjacent to the side wall of which it is a continuation,separating a central portion of the said one of the walls of the foldedportion from the said side wall of which it is,a continuation to formthe pocket while heatingand pressing the remaining walls together toseal said remaining walls and to support the pocket. Y 5. The process offorming an external pocket in a sealed end of a bag made of heat sealingall material comprising the steps of bringing the two side walls of thebag adjacent to each other, transversely folding the two side walls backupon themselves to form four walls of the material V with one of thewalls of the folded portion disposed adjacent to the side wall of whichit is a continuation, leaving unsealed a central portion 2, A bag havingtwo sides with a pocket provided in a sealed end-portion thereof, saidsealed end portion comprising the transverse edge of the J two sidesfolded back .upon themselves andforming four walls ofthematerial of thebag with one of the walls of the folded portion-disposed adjacent to theside wall of which it is a continuation, the central portion of the saidone of the walls of thefolded portion and of said side wall of which itis a continuation being unsealed with each other and forming the insidesurfaces of said pocket, the remaining portion of the four said fourfolded walls being sealed in a flatwise of the said one of the walls ofthe folded portion from, the said side wall of which it is acontinuation to form the pocket while heating and pressing the fourwalls all the way across the marginal edge portion of the transversefolded end of the bag and the four walls on the opposite side of thepocket to support the pocket.

,6. Theprocess'of forming an external pocke in a sealed end of atwo-sided bagmadepf heat sealing, material comprising the steps ofbringing the two side walls of the bag at said end adjacent to eachother, transversely folding the said two side walls back uponthemselves'to dis pose the folded wall parallel to the said sides' ofthe bag with at least one of the folded walls disposed adjacent to oneof said side walls, heat: ing and pressing the folded walls along thmarginal edge of said end transversely of the bag to seal the same andalso inwardly from said maropen, pocket supported by the sealed wallsalong said'marginal edge and on said oppositesides. v

7. A bag having two relatively flat sides joined along theirlongitudinal edges and having a pockfolded walls between the edges ofthe bag and the pocket being sealed and supporting the pocket,

et provided in a sealed end portion thereof said sealed end portioncomprising the transverse edge of the two flat sides folded back uponthemselves and forming an end comprised of a plurality of 'walls disdouble walls of the material of the bag with the folded back wallsdisposed substantially parallel to the said flat sides of the bag, themarginal edge portions of the transverse folded end of double wallsbeing sealed all the way across the bag between said longitudinal edgesto close the end of the bag,. the folded end of double walls inward fromsaid marginal edge portion and adiacent said longitudinal edges beingalso sealed, and having a central portion therebetween unsealed toDmvide said pocket between the said substantially parallel to said flat8. The process of forming an external pocket in a sealed end of a baghaving two relatively flat sides joined along their longitudinal e esend portlon't'o close the end and made oi. heat sealing material,comprising thestepsofbringingsaidtwoflatsidewalls ofthebagadjacenttoeachotherinparallelrelationship, i:ransversely foldingthe two side walls.

back upon themselves to form a plurality of double walls or saidmaterial dispos d substantially paralleltosaidflatsidesofthebag,sealingthe marginal edge portion of the meme folded endot doublewallsall'theway acrossthebag between said longitudinal edges to close theend,

oi the ba and sealing the said folded end of double walls ginal edgeportion; edges of the bag and a dlstance inwardly tromsaid maradjacentsaid longitudinal leaving unsealed a central portion therebetween toprovide said pocket between said walls parallel to said 9. Abaghavingtwo flat sides joined atanend of-thebagto form th 'end portion oi'thebagand having a pocket formed in said end portion. saidendportionbeingsealed across the width of said flat sides along the'marginal edge ofsaid endportiontoclos'etheendoithebamsaidend portion having at least twothicknesses of .the

,materlal or thebag formed by at leaston ofsaidflatsidesbeingioidedbackimonthebagat said end, thecentral portionoithesaid-at leasttwo thicknesses inward otthebag'from saidmarginaledgebeingunsealedwitheachoflier andformingtheinsidesuriace'sofsaidpocketthe portion of the said at leasttwo thicknesseson oD- 'to form a heat sealed end poandhavingapocketinthe support the pocket. 1 a Y 10. A bag having twoflat sides joined at the end of the bag to form the end portion of theba and having a pocket formed in said end portion, said end portionhaving said fiat sides inface contact along th marginal edge of said ofthe bag, said end portion having the flat contacting sides tolded backupon the bag at said end, forming at least four thicknesses of thematerial or the bag,

the central portion ofthe part folded back upon the bag'being unsecuredto the bag, forming with the bag a pocket, the four thicknesses of theendot thebagon opposite sides of the pocket being secured together. I

11. A bag having'two flat sides sealed at an end of the bag to formasealedend portion of the bag and having a pocket in the said sealedportion having'said marginal edge of said sealed end portion to seal theend of the has, said sealed end portion having the flat contacting sidesfolded back upon the bag at said end, iorming at least four thicknessesof the material of the bag, the central portion of the I part foldedback upon the bag being unsealed to the bag, forming with the bag apocket, the said at least four thicknesses of the end of the ba onopposite sides of the pocket being sealed together. I '12. A bag made oiheat sealing material having two flat sidesheat sealed at an end of thebag on of the has sealed end portion; said sealed end portion havingsaid flat sides in face contact along the marginal edge of said sealedend portion said sealed end portion having the flat contact-'ofthebamthecentral i edback'uponthebagbeing ing sides folded .back uponth bag at, said end, Ionizing atleaat tour portion of the part101dunsealed to the bag;

- forming with the baga pocket, the said at least to seal the end of theba thicknesses of the material-

